Heat the oil, black beans, Szechuan peppercorns, cardamom pods, 4 star anise, 3 cinnamon sticks and all but 1 slice of ginger in a large saucepan over medium-low heat until the oil reaches 250 degrees F, about 10 minutes. Remove from the heat and let sit for 5 minutes to infuse.
Meanwhile, whisk together the gochugaru, red pepper flakes, Kashmiri red chile powder, sugar, MSG, garlic, onion remaining star anise, cinnamon sticks, ginger slice and 1 teaspoon salt in a medium heat-proof bowl.
Strain the spiced oil through a fine mesh sieve into the dry chile mixture and stir to combine. (Discard the oil-soaked whole spices.) Let sit at room temperature for at least 1 hour and up to 24 hours. The flavor will develop and intensify as it sits. Serve when completely cool.
Refrigerate in an airtight container for up to 1 month. |